Malicious PDF — malware analysis report

Static analysis result for SHA-256 3274357ca9604127…

MALICIOUS

PDF

81.9 KB Created: 2021-07-08 07:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6fd168430bd2babad94d5e1f9f715ce5 SHA-1: 3e5b85166496ac5b9c22039ad7defc139ed3ae86 SHA-256: 3274357ca960412741affe163c55b4b2b45846df683b968a104456264fa1fc01
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or tech-support scam. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or redirect users. While no scripts were directly extracted, the presence of embedded URLs and the heuristic 'SE_CALLBACK_LURE' strongly indicate a social engineering attack aimed at tricking the user into initiating a phone call.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=anger+thermometer+worksheet PDF link annotation
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/0bb634ab9f33a52eac055d6ce76fbe54/89779711137.pdfIn PDF document text
    • http://kelvista.lt/images/files/vuxaxuxajiluwadoso.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd81c27dae---vuzovufiwiz.pdfIn PDF document text
    • https://autopratichesas.it/file/kowiparexigopot.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16227242696706.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/8c2e8606f23695b4ab87683e5c992d5f/65098282377.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/12837856712.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/maviregusuxizogijosirikot.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/16212730936.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210607125133_9uudy4.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/52fca68f9079d8eb9093a9f67bcfb863/35587498425.pdfIn PDF document text
    • http://ledson.ru/upload_picture/17249994003.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9afb753c---45663715500.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/41700103467.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d082c26141---49215011547.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/hs38qunspbms209vovk6h92ih9/82229701252.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/609fd6778f581f247455d94b4d3c035b/kerozutukabi.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/45b34dfa78666961fe8756440713e05a/novedumawokivejagifetavep.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/90765927208.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/69bad844186fdc6fc72bdedda8f24a52/juziwanedinar.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/c44a16c18a59e4034ce689b3c61911a0/fizowipogekovixaze.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607df80b28b67---jeroropopadedisosexuget.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 17120 bytes
SHA-256: a215a3dfc64f287f87882f0a41538bbdaed3737a30f47db97404c09600501a6d
font_01_sfnt_off00010b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0F 10416 bytes
SHA-256: abec561a59dfb3ff162c20dbb84bbde5371b913878eb36fb35827a97122a24dd
font_02_sfnt_off00012292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12292 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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